<template>
  <div>
    <div class="search">
      <input class="search-input"
             type="text"
             placeholder="输入城市名或拼音"
             v-model="keywords"
      >
    </div>
    <div
      class="search-content"
      ref="scroller"
      v-show="keywords"
    >
      <ul>
        <li v-for="item of list"
            :key="item.id"
            @click="handleCity(item.name)"
            class="search-item border-bottom"
        >
          {{item.name}}
        </li>
        <li class="search-item border-bottom" v-show="hasNoData">
          没有找到匹配数据
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
  import { mapMutations } from 'vuex'
  import Bscroll from 'better-scroll'
  export default {
    name: "CitySearch",
    props:{
      cities:Object
    },
    data(){
      return{
        keywords:'',
        list:[],
        timer:null
      }
    },
    methods:{
      handleCity(city){
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    computed:{
      hasNoData(){
        return !this.list.length
      }
    },
    watch:{
      keywords(){
        if (this.timer){
          clearTimeout(this.timer)
        }
        if (!this.keywords){
          this.list = []
          return
        }
        this.timer = setTimeout(()=>{
          const result = []
          for (let i in this.cities){
            this.cities[i].forEach((vaule)=>{
              if (vaule.spell.indexOf(this.keywords) > -1 ||
                  vaule.name.indexOf(this.keywords) > -1){
                result.push(vaule)
              }
            })
          }
          this.list = result
        },100)
      }
    },
    mounted() {
      this.scroll = new Bscroll(this.$refs.scroller)
    }
  }
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl";
  .search
    height .72rem
    padding 0 .1rem
    background: $bgColor

    .search-input
      box-sizing border-box
      width 100%
      height .62rem
      padding 0 .1rem
      line-height .62rem
      text-align center
      border-radius .06rem
      color #666
  .search-content
    z-index 999
    position absolute
    overflow hidden
    top:1.58rem
    left 0
    right:0
    bottom:0
    background: #eee
    .search-item
      line-height .62rem
      padding-left .2rem
      color #666
      background: #ffffff
</style>
